<?php
/**
 * Created by PhpStorm.
 * User: LuoQin
 * Date: 2016/3/21
 * Time: 13:46
 */
namespace Api\Controller;
use Think\Controller;

class McryptController extends Controller
{
    private $iv,$key;

    function __construct()
    {
        $this->iv = C("appsecret");
        // $this->iv = substr(md5(C("appsecret")),8,16);
        $this->key = C("appsecret");
        // $this->key = substr(md5(C("appsecret")),8,16);
    }

    //加密
    function encrypt($str) {
        $iv = $this->iv;
        $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);
        mcrypt_generic_init($td, $this->key, $iv);
        $encrypted = mcrypt_generic($td, $str);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        return bin2hex($encrypted);
    }
    //解密
    function decrypt($code) {
        $code = $this->hex2bin($code);
        $iv = $this->iv;
        $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);
        mcrypt_generic_init($td, $this->key, $iv);
        $decrypted = mdecrypt_generic($td, $code);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        return trim($decrypted);
    }
    //十六进制转二进制
    protected function hex2bin($hexdata) {
        $bindata = '';
        for ($i = 0; $i < strlen($hexdata); $i += 2) {
            $bindata .= chr(hexdec(substr($hexdata, $i, 2)));
        }
        return $bindata;
    }
}